

<div id="content-container" class="container">
<div class="panel panel-default">
    <div class="panel-body">
        测试开始课程
    </div>
</div>

<button type="button" id="openclass" class="btn btn-default send-btn" aria-label="Left Align">
    <span class="glyphicon glyphicon-align-left" aria-hidden="true"> 开始上课</span>
</button>

<button type="button"  class="btn btn-default student-btn" aria-label="Left Align">
    <span class="glyphicon glyphicon-align-left" aria-hidden="true"> 模拟学生1</span>
</button>

<button type="button"  class="btn btn-default student2-btn" aria-label="Left Align">
    <span class="glyphicon glyphicon-align-left" aria-hidden="true"> 模拟学生2</span>
</button>

<button type="button" class="btn btn-default close-btn" aria-label="Left Align">
    <span class="glyphicon glyphicon-align-left" aria-hidden="true"> 结束考勤</span>
</button>
</div>